Definition (质量)
To be of such exceptional quality that it cannot be compared to anything else.
百般无一遮、别机核行
The service and food at this restaurant are in a class by themselves, with nothing else comparable.
这家餐厅的服务和食物都是独一无二的，无与伦比。
Her piano playing skills are in a class of their own; truly unparalleled.
她的钢琴演奏技巧是独一无二的，真的无与伦比。
The bespoke service at this hotel is in a class by itself, with no comparison.
这家酒店的定制服务是独一无二的，无与伦比。